Lubricated fan-mounting



S. N. SENNA.

LUBRICATED FAN MOUNTING.

APPLICATION FILED MAR- 811919.

1,328,017, I v I Patented Jan.1s,1 20,

INVENTOR.

WY M ATTORNEY.

UNITED STATES PATENT ornron,

SAMUEL N. S NNA, orHoLYoKn, MASSACHUSETTS, ASSIGNOR TO B. r, PERKINS &son, me, or HOLYOKE, MASSACHUSETTS, A CORPORATION or MASSACHUSETTS.

LUBRICATED FAN-MOUNTING. 1

Patented Jan; 13, 1920.

Application filed March 8, 1919. Serial No. 281,485.

To all whom it may concern: I

- Be it known that I, SAMUEL N. SENNA,

a citizen of the United States 'of America,

residing at Holyoke, in the county of Hamp- 5 den and State ofMassachusetts, have invented certain new and useful Improvements inLubricated Fan-Mountings, of

fans must be very powerful and travel at very high speed; and yet mustbe portable, 2 say, carried on pedestals. The combining of these twofeatures, portability and great power, presents a peculiarly diflicultproblem. For, if portability is to be secured, the fan and its motormust be, in practical effect, a single unit with the fan carrieddirectly iupon the motor shaft; in spite of the fact that themotor-shaft bearings of the commercial electric motor are ill-fitted towithstand the powerful thrusts exerted by the fan. I have devised afan'mounting directly applicable to the usual commercial electric motor,which provides for the proper taking up of the fans thrust loads, andfor the lubricating of the bearing parts by the utili- 3-5 zation ofparts present in the usual commercial motor.

One object of my invention is to provide a fan mounting immediatelyapplicable to commercial electric motors which mounting 40 will properlytake care of the thrust loads im osed by the fan.

other object is to provide a proper lubricating means,utilizingprovisions upon the shaft of the usual commercial motor,- forlubricating a mounting such as that just above indicated.

To these ends, and also to improve generally upon devices of thecharacter indicated, my invention consists in the following mattershereinafter described and claimed.

In the accompanying drawings, Figure 1 is a perspective view of aman-cooler fan to which my invention is applied, and Fig. 2 is adiametrical cross-sectional view of a fan mounting embodying myinvention.

Because The hub 1 of the fan carries the usual blades 2, as by havingtheir shanks 8 screwed into the recesses .4 and held by set screws 5.The hub is provided with the usual bore 6 to receive the shaft S of theelectric motor M, the :bore having the usual keyway 7 extending from endto end thereof, and the set screw 8. i l

According to the invention, the bore 6 is considerably enlarged at itsinner end to present an annular recess 9, affording an annular shoulder10, and a circularwall'll. This recess is designed to receive an annularplate-thrust ball-bearing B composed of plates 12, 12, each with araceway 13, and balls lttraveling .upon theraceways. Also, the hub isprovided with a lubricant passage or duct, 15 extending from theexterior o' the hub into the bore 6 at the, keyway 7 and arrangedpreferably obliquely to the bored; An, oil cup, 16 is preferablyprovided as shown.

The structure just described is immediately applicable to the usualcommercial motor. Such a motor has the shaft S with 0 a keyway 17extending through the exposed length thereof, and also has a stationarypart or abutment, as a projecting bushing 18, surrounding the inner endof the exposed portion of the shaft.

In mounting the described fan upon the shaft S, a key ,19 is used of alength sufiiciently short to provide that the .key does not extendacross on close the entrance to the duct 15 and leaves a ortion of thekeyway 9o 17 unoccupied. The ub, with the bearing B carried therein, isslid along the shaft sufficiently to back the rear plate of the bearingagainst the projection 18, so that the thrust loads of the fan, whichact to the left as viewed in Fig. 2, and are, of course, caused by theair pressure upon the fan blades, are transmitted through the bearingand taken by the projection 18 which, for present purposes, may beconsidered as a part of the ,motor casin Of course, the wall 10 backsagainst 1; e forward plate of the bearing.

Oil from the duct 15 passes into the unoccupied portions of the keyWa-ys7 and 17 and,

so, is fed to the bearing B, being retained by the wall 11 and the rearplate 12.

It will be seen that I have provided a fan mounting immediatelyapplicable to commercial motors, which mounting properly takes care ofthe thrust loads imposed by the fan, and which includes a properlubricating means, utilizing provisions upon the shaft of the motor.

1. The'combination with a motor having-a shaft projecting from one endof its casing and a keyway in said projecting portion, a hub on saidprojecting portion and having a keyway therein, a recess provided in"the'hub adjacent the motor casing, a thrust bearing in said recess, anda key of less length than the keyvvvays and engaged therein so as toleave portions thereof adj acent said bearing oftheprojecting portionvof said shaft, said shaft being provided with a keywayextendingrtherealong and having a portion adjacent said inner end; a:fan presenting a hub I mounted upon said. shaft and. formed at its innerendto provide a bearing-receiving recess, said hub having-a: keywaytherealong, a plat'e'sthrust bearing: received in S5116 recess engagingsaid abutment With itsrear plate and the'bottom of said recess withitsfor- Ward p1at'e,-a key received in, and of" less length than, thekeyway of the shaft and located therein to leave that portion of suchkeyway adjacent said recess and bearing unoccupied, said hub also beingprovided with lubricant duct communicating from" the exterior of saidhub With the said unoccupied portion, whereby lubricant may be fed tosaid bearing through said duct and keyways.

31 In a fan mounting, in combination, a motor presentmg a pro ectlngshaft and a stat1onary abutment ad acent the inner end of the 'projBCtlllgiPDllblOll: of said shaft, 1; said-1T shaft bein provided with akeyway extending: therea fong and havlng a- P01171011: adjacent.-sa1dinner end, a fan presenting a hub mounted upon said shaft and formed atits inner: end to provide a bearing-receivingi recess,,said hub having akeylway' therealong and having aport-ion adj acentvsaidrecess, aplate-thrust bearmgrecewed 111'- said recess engaging: said abutmentwith its; rear plate and the bottom of said recess with it's/for Wardplate, a. key received in, and of: less length than, said." keyways: andlocated to leave the portions of' such :keyways adjacent said recess andbearing unoccupied,',said hub alsobeing provided with a -lubnicant ductcommunicating: from the exterior of said-hub: with: the said unoccupiedportions, whereby, lubricant maybe fed to said bearing throughsaid ductand keyways SAMUEL'N. SENNA.

